I answered this in another thread but figured I would start a new topic since it seems important. I just called Princess and spoke to a rep after receiving a message from them advising I needed a passport for my caribbean cruise. They said that all cruises visiting Martinique and Guadeloupe will now require passports (I'm a US citizen btw). Here's the message I got:    Please be advised that documentation requirements for your voyages have been updated. A valid passport is now required